Dead Cylinders

[Johnpat]

Those cylinders are running mates,check for fuel
or ignition problem.
#1-6
#4-7
1843
6572

 

[Dan The Man]

What is the carburetor? If it's a carter, it is a typical stuck float on on side or the other.

Eddy 1411

 

[66chargerpat]

That would be the $64,000 question....do those cylinders go to the same side on the 440? Anybody?? That would truly narrow it down.

1,7,4 and 6 all use one side of the carb on a dual plane intake.

 

[Funship32]

@diesel_lv: No problem, mate. Neither you or I are there so we don't know the situation 100%.

 

[Jerry Hall]

Eddy 1411

Eldebrock, Carter act basically the same on a dual plane intake.

 

[Funship32]

If a carb issue I would try the following: With the engine (barely) running, I'd spray some gumout in the carb barrel that feeds the 1/2 of the dual plane that feeds those cylinder(s). I believe it is the right side when looking at the engine from frt to rear. If only running on 4 cylinders, she'll spark to life QUICK if a fuel feed issue.

 

[pnora]

If a carb issue I would try the following: With the engine (barely) running, I'd spray some gumout in the carb barrel that feeds the 1/2 of the dual plane that feeds those cylinder(s). I believe it is the right side when looking at the engine from frt to rear. If only running on 4 cylinders, she'll spark to life QUICK if a fuel feed issue.

It will also do the same if there is a vacuum leak. I suspect vacuum booster.

 

[Dan The Man]

It will also do the same if there is a vacuum leak. I suspect vacuum booster.

Funny you should say that. The brakes were extremely sensitive, almost over reacting to pedal pressure.

 

[68Moparmaniac]

Are these 4 cylinders connected in any way? Through the carb, ignition etc.?

I would trouble shoot the problem by starting with the simple stuff. Make sure the plug wires are getting juice to the plugs, if so then that's one of the variables to cross off the list and start looking else where. After that I would make sure the ECM isn't going south on you. Keep it simple at first, verify the basics, then if all checks out move on to the next suspect. If your getting fuel and spark then things get more involved, could have collapsed lifters, stuck valves, springs sacked. You never mentioned the age of the engine, cam profile etc. so we're just spit balling here until we get some more information.

 

[Nevada dan]

Do you have another carb, or know someone with one , it takes 15 minutes to swap one out , I REALLY doubt its electrical with those cylinders dead , besides you can pull a plug wire stick a phillips screwdriver in the end , hold the screwdriver next to metal and have someone crank the engine over you will see spark jump, check the basic easy stuff spark and fuel , if its your spark its about a million to one chance its just affecting those holes

 

[Dan The Man]

Do you have another carb, or know someone with one , it takes 15 minutes to swap one out , I REALLY doubt its electrical with those cylinders dead , besides you can pull a plug wire stick a phillips screwdriver in the end , hold the screwdriver next to metal and have someone crank the engine over you will see spark jump, check the basic easy stuff spark and fuel , if its your spark its about a million to one chance its just affecting those holes

Going to grab the one off my Cuda.

 

[Gone Duck]

69 Charger 440 with electronic ignition conversion. I had a miss and pulled each plug wire at the cap and had no change in idle on cylinders 1,4,6 and 7. Carb was just rebuilt. ??

Remove valve covers and check rockers on the intake valves.

 

[Nevada dan]

did you change the carb? just curious

 

[Dan The Man]

did you change the carb? just curious

The ONLY thing I did was rebuild the carb. The problem is def the carb.

 

[Photon440]

The ONLY thing I did was rebuild the carb. The problem is def the carb.

Yes, but Nevada dan was asking if you changed the carb after you said on April 8 that you were going to try the one from your 'Cuda. Did it work?

 

[Dan The Man]

Yes, but Nevada dan was asking if you changed the carb after you said on April 8 that you were going to try the one from your 'Cuda. Did it work?

No never got a chance to go and get that carb. It is in a different location than where I live.

 

[Dan The Man]

did you change the carb? just curious

No never got a chance to go and get that carb. It is in a different location than where I live.

 

[Dan The Man]

Yes, but Nevada dan was asking if you changed the carb after you said on April 8 that you were going to try the one from your 'Cuda. Did it work?

OK I pulled the top half of the carb. I did find some of the very tiny passages on the Venturi boosters to be clogged. I didn't like the way the needles were sticking in the seat assemblies so I replaced them. I shot carb cleaner down all 4 metering jets and got nice flow through the boosters. I put carb cleaner in the plunger hole and got nice flow through the pump jets. Everything else looked fine. I do have 3 questions before I button this up. Are the primary metering jets larger than the secondaries? What color piston springs and what size metering rods? I used the original rods?? and orange springs from factory. I did replace the jets that came with the 1477 kit.

 

[Photon440]

Carter designs often have slightly larger primary jets compared to the secondary side, but with the metering rods in place they flow less. I believe the stock size is .110 primary and .107 secondary jet.